condition mean min max ZT0-3 5.95 5.95 5.95 ZT4-7 4.4 4.4 4.4 ZT8-11 17.65 17.65 17.65 ZT12-15 5.9 5.9 5.9 ZT16-19 7.05 7.05 7.05 ZT20-23 4.449999999999999 4.449999999999999 4.449999999999999